P2C2: Testing Interpretations of the Oxygen Isotopic Composition of Asian Cave Calcite at Abrupt, Millennial, and Orbital Timescales

P2C2：在突变、千年和轨道时间尺度上测试亚洲洞穴方解石氧同位素组成的解释

• 批准号: 2202913
• 负责人: Richard Edwards
• 金额: $ 49.51万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2202913&HistoricalAwards=false
• 关键词: P2C2; Testing; Interpretations; Oxygen; Isotopic

The general research aim of this project is to further explore the Asian Monsoon from a previously constructed 640,000-year long, high-resolution record of the oxygen isotopic composition of cave calcite from the region of China currently affected by Asian monsoon rainfall. The project specifically seeks to examine several issues related to the Asian monsoon to better understand the mechanisms that cause abrupt, millennial-scale, and orbital-scale changes in Asian Monsoon rainfall through questions such as: (1) where across Asia have inferred changes in rainfall taken place; (2) to what extent have changes in the position of the sub-tropical jet affected Asian monsoon rainfall east of Tibet; and (3) were inferred changes in climate for portions of Central Asia north and west of the Tibetan Plateau caused by changes in winter or summer precipitation. Answers to these questions aim to understand the mechanisms that cause abrupt, millennial-scale, and orbital-scale changes in Asian Monsoon rainfall.The potential Broader Impacts include a better understanding of the Asian Monsoon, international collaboration with Chinese scientists of mutual benefit to the United States and China, and support for a post-doctoral scholar.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目的总体研究目标是根据先前建立的长达64万年的高分辨率洞穴方解石氧同位素组成记录进一步探索亚洲季风。该记录来自目前受亚洲季风降雨影响的中国地区。该项目专门研究与亚洲季风有关的几个问题，以通过以下问题更好地理解导致亚洲季风降水突然、千年尺度和轨道尺度变化的机制：(1)亚洲各地的降水发生了什么变化；(2)副热带急流位置的变化对西藏以东的亚洲季风降水的影响有多大；(3)冬季或夏季降水的变化导致中亚北部和青藏高原以西部分地区的气候变化。对这些问题的回答旨在了解导致亚洲季风雨发生千年尺度和轨道尺度突变的机制。潜在的更广泛的影响包括更好地了解亚洲季风，与中国科学家进行国际合作，对美国和中国互惠，以及对博士后奖学金的支持。这一奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的学术价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Climate variability in the northern Levant from the highly resolved Qadisha record (Lebanon) during the Holocene optimum

• DOI: 10.1017/qua.2023.24
• 发表时间: 2023-07
• 期刊: Quaternary Research
• 影响因子: 2.3
• 作者: C. Nehme;S. Verheyden;T. Kluge;F. Nader;R. Edwards;Hai Cheng;E. Eiche;P. Claeys

Multi-proxy validation of glacial-interglacial rainfall variations in southwest Sulawesi

• DOI: 10.1038/s43247-023-00873-8
• 发表时间: 2023-06
• 期刊: Communications Earth & Environment
• 作者: A. Kimbrough;M. K. Gagan;G. Dunbar;W. Hantoro;Chuan‐Chou Shen;Hsun-Ming Hu;Hai Cheng;R. Edwards;H. Rifai;B. Suwargadi